BebboSSH

Short: BebboSSH – SSH2 suite (client/server, sftp) with modern ciphers
Author: s.franke@bebbosoft.de
Uploader: s.franke@bebbosoft.de
Architecture: m68k-amigaos
Type: comm/net
Version: 1.40
Required: bsdsocket.library (e.g. AmiTCP)
Replaces: amigassh

📖 Overview

BebboSSH is an SSH2 implementation for Amiga systems (68000+).

📦 Source Code: https://franke.ms/git/bebbo/bebbossh

It requires a server that supports the included cryptographic algorithms.
The supported cryptographic methods are

• curve25519-sha256

• curve25519-sha256@libssh.org

• ssh-ed25519

• aes128-gcm@openssh.com

• chacha20-poly1305@openssh.com

• hmac-sha2-256

• sha512

So it needs a server that supports that.

It provides the following tools and libraries:

• bebbosshd – SSH2 server daemon

• bebbossh – SSH2 client

• bebboscp – SCP file transfer utility

• bebbosshkeygen – Key generation tool (Ed25519)

• libcryptossh.library

• libcryptossh.library020 (rename and use on 68020–68040 or 68080 CPUs)

👉 Also check out bebboget for fast HTTPS downloads!

⚡ Performance

It will work on an unaccelerated Amiga but establishing the connection takes
about one minute.

Example timings on an Amiga 3000:

• X25519 key pair creation: ~0.9s

• Signature verification: ~1.2s

Use -v5 for DEBUG logs with timing info

Expected SCP transfer speeds (kB/s):

| Cipher       | UAE-A500/68000 | UAE-1200/68020 | A3000/68030 | V4SA/68080 |
|--------------|----------------|----------------|-------------|------------|
| AES-GCM      | 6.6            | 35.6           | –           | 317        |
| ChaChaPoly   | 5.8            | 32.2           | –           | 351        |

020 library version:

| Cipher       | UAE-A500/68000 | UAE-1200/68020 | A3000/68030 | V4SA/68080 |
|--------------|----------------|----------------|-------------|------------|
| AES-GCM      | –              | 44.6           | –           | 353        |
| ChaChaPoly   | –              | 60.1           | –           | 396        |

🛠 Programs

`bebbossh`

SSH2 client for interactive shells or remote command execution.
Supports config files, key authentication, port forwarding, verbosity levels, and cipher selection.

`bebbosshd`

SSH2 server daemon.
Provides terminal emulation and SFTP file transfers.
Requires configuration in ENVARC:ssh (config, keys, passwd).

`bebbosshkeygen`

Generates Ed25519 key files.

`bebboscp`

SCP utility for copying files between local and remote systems.
Supports wildcards, config files, key authentication, verbosity, and cipher selection.

👥 Testing

Special thanks to testers:

• Patrik Axelsson

• Javier de las Rivas

• AiO (Joakim Ekblad)

📜 License

Most of BebboSSH is licensed under GPLv3+.
This includes:

• Core tools (bebbossh, bebbosshd, bebboscp, bebbosshkeygen)

• Cryptographic implementations (AES, ChaCha20, DES, 3DES, RC4, GCM, MD5, Poly1305, SHA-256/384/512)

• STL/ministl infrastructure and wrappers

• Java-like classes

Some components are derived from SUPERCOP (Bernstein, Lange, Schwabe, et al.) and are released into the Public Domain:

• Ed25519 internal math routines

• X25519 scalar multiplication

• Field arithmetic helpers

Combined use: The project as a whole is GPLv3+, but PD-marked files remain PD.

⚠️ Disclaimer of Warranty

Software is provided “AS IS” without warranty of any kind.
Use at your own risk.

⚠️ Limitation of Liability

The author shall not be liable for any damages (direct, indirect, incidental, or consequential) arising from use or distribution of this software.

🕑 History

BebboSSH v1.39

• Name change to BebboSSH

• Consolidated crypto with BebboGet

• Rewrote AES for speed improvements

• Improved ChaCha20-Poly1305 performance

• Source code available at: https://franke.ms/git/bebbo/bebbossh

Previous Versions (AmigaSSH)

• v1.38: Added ChaCha20/Poly1305, config file support for ciphers

• v1.37: Speed enhancements, faster key generation and verification

• v1.36–v1.29: Various fixes, SFTP improvements, ESC handling, channel management refinements

RANDOM HINTS

• the know hosts are stored in ENVARC:.ssh/known-hosts

• the random generator is not the best…

It’s rand() pimped with time and vpos. Then SHA256 is applied. Good enough?
But who would talk about security on an unprotected system like the Amiga?

• preset your username with

set USER=
you can do this in s:shell-startup

• you can start it from the workbench!

Use the icon tooltypes to set
COMMAND a remote command to execute instead of a shell
CONSOLE an Amiga console string (defaults to CON://///AUTO/CLOSE/WAIT)
HOST the host name
PORT the port (defaults to 22)
TERM the terminal emulation (defaults to xterm-amiga)
USER the user name

• no console graphics?

install the xterm-amiga terminfo!

• no console colors?

install the xterm-amiga terminfo!

• no mouse in mc or other applications?

install the xterm-amiga terminfo!

• keys not working properly?

install the xterm-amiga terminfo!

• can’t install xterm-amiga and have to build it for my system?

use tic and add the switch -s:
tic -s xterm-amiga.src

• some key does still not work

try pimping the xterm-amiga terminfo.
use tic -xsv9 -o. xterm-amiga.src

• console displays trash? text look blank? lines are bogus?

unset the variable LANG

• scp to bebbosshd: closed remote port

ensure you are using the sftp subsystem, on some systems it’s the -s flag
scp -s ...

• your remote Amiga is blocking coz you accessed a volume that doesn’t exist?

e.g.: list foobar:
Get https://aminet.net/util/boot/Requester.lha
and run “Cancel 5” from your startup-sequence!
Or try https://aminet.net/util/cdity/OkayDokay14.lha.

• public key authentication does not work!?

Check the file ENVARC:.ssh/authorized_keys if your
public key is listed there.

• can’t scp to a server named ‘ram’, e.g. amigascp c:s* ram:folder

add your user name to avoid detection as a local assign/drive:
myname@ram:folder

• the program aborts with a message like “can’t resolve _Z9splitLineRPc”?

• ensure that you are using the recent libcryptossh.library

• if you just updated bebbossh, close all running bebbossh programs and run

“avail flush”

• ENTER does not work with multiple SSH hops? Try CTRL+J

🚀 Summary

BebboSSH brings modern SSH2, SCP, and SFTP functionality to classic Amiga systems, with optimized cryptographic routines and support for both 68000 and 68020+ CPUs.